“We oppose current initiatives to mandate labeling of ingredients developed from GM seeds in the absence of any demonstrated risks. Such mandatory labeling could imply that food products containing these ingredients are somehow inferior to their conventional or organic counterparts.”

The site contains extensive details of research, citing hundreds of scientists and dozens of global governments, arguing that its foods are safe. It says food safety is Monsanto’s “first priority.”

Tim Owens of Fort Collins, while marching along Peterson Street from Library Park to Lake Street on Saturday, said the altered DNA of crops is likely responsible for recent decreases in the honeybee population.

“Look how much cancer is going on in the world,” he said, adding that he grows his own non-GMO tomatoes, peppers, onions and more in a home garden.

The group moved to one of the city’s main intersections at Mulberry Street and College Avenue, growing larger along the way. Many waved signs deriding Monsanto, calling its practices unnatural and poisonous.

Sandy Lemberg, one of the organizers, said the event was planned only about a week in advance. They’d originally intended to appear at Old Town Square, but the space was already occupied for events associated with the Realities for Children Ride and Rally.

Lemberg said he became involved because he doesn’t see the government cracking down on concerns about food producers without a grass-roots effort.